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CVE-2015-7550
The keyctl_read_key function in security/keys/keyctl.c in the Linux kernel before 4.3.4 does not properly use a semaphore, which allows…
Medium5.5EPSS 0.41%
- Published
- Updated
- Reserved
- Assigned by
- redhat
Description
The keyctl_read_key function in security/keys/keyctl.c in the Linux kernel before 4.3.4 does not properly use a semaphore, which allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact via a crafted application that leverages a race condition between keyctl_revoke and keyctl_read calls.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium5.5 | CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.41% · top 64% of all CVEs (4 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
Affected products
n/a
- affected n/a
References (16)
- 79903 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.4 (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-2911-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- USN-2890-3 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- SUSE-SU-2016:1102 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=1291197 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://github.com/torvalds/linux/commit/b4a1b4f5047e4f54e194681125c74c0aa64d637d (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-2911-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- SUSE-SU-2016:2074 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
- USN-2890-2 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- https://security-tracker.debian.org/tracker/CVE-2015-7550 (opens in a new tab)x_refsource_CONFIRMx_transferred
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b4a1b4f5047e4f54e194681125c74c0aa64d637d (opens in a new tab)x_refsource_CONFIRMx_transferred
- USN-2890-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- DSA-3434 (opens in a new tab)vendor-advisoryx_refsource_DEBIANx_transferred
- USN-2888-1 (opens in a new tab)vendor-advisoryx_refsource_UBUNTUx_transferred
- SUSE-SU-2016:0911 (opens in a new tab)vendor-advisoryx_refsource_SUSEx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
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[](https://trackcve.app/cve/CVE-2015-7550)Record last updated .